Income Taxes - Disclosure of Expiry of Tax Loss Carryforwards (Details) - CHF (SFr) SFr in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure Of Detailed Information About Income Taxes And Deferred Taxes [Line Items] | ||
| Tax loss carryforwards | SFr (252,980) | SFr (195,126) |
| 2027 | ||
| Disclosure Of Detailed Information About Income Taxes And Deferred Taxes [Line Items] | ||
| Tax loss carryforwards | (29,566) | (29,566) |
| 2028 | ||
| Disclosure Of Detailed Information About Income Taxes And Deferred Taxes [Line Items] | ||
| Tax loss carryforwards | (58,632) | (58,632) |
| 2030 | ||
| Disclosure Of Detailed Information About Income Taxes And Deferred Taxes [Line Items] | ||
| Tax loss carryforwards | (56,285) | (56,285) |
| 2031 | ||
| Disclosure Of Detailed Information About Income Taxes And Deferred Taxes [Line Items] | ||
| Tax loss carryforwards | (50,643) | (50,643) |
| 2032 | ||
| Disclosure Of Detailed Information About Income Taxes And Deferred Taxes [Line Items] | ||
| Tax loss carryforwards | SFr (57,854) | SFr 0 |